1St Wedding Cake

I have my first wedding cake this weekend.....little nervous...little excited! I've done a couple of practice cakes for design and such and feel pretty comfortable with everything....It's a 4 tier all bc cake, stacked, except the top tier is on pillars. Oh and it's sitting on top of a 3 foot round glass plate that is on top of wine glasses, upside down with lights inside. (hope that makes sense!) --thats the nervous part! just wondering if there's any last minute suggestions or tips out there? thanks!!

I should also mention that she wants candles sitting on each tier and around the cake....so I have those battery operated candles to sit inside votives....those wont be too heavy for the cake will they?

well, I'm not sure....she showed me a picture and it looks like they are large wine glasses upside down with the plate on top. I would say the glasses weren't typical drinking glasses, they looked to be 5-6 inches around? She said her cousin had a 5 tier cake on this setup. She didn't seem to worried about it...guess I shouldnt be either??!?